FUNCTIONAL RESPONSES OF THREE SPECIES OF PREDATORY LADYBIRDS (COLEOPTERA: COCCINELLIDAE) TO POPULATION DENSITIES OF BEMISIA TABACI (HOMOPTERA: ALEYRODIDAE)

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GHAHARI H.; SHOJAI M.; BAYAT ASADI H.

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Journal Paper

Paper Information

Journal: Applied Entomology and Phytopathology Year:2003 | Volume:71 | Issue:1 Page(s): 79-90

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Information Journal Paper

Title

FUNCTIONAL RESPONSES OF THREE SPECIES OF PREDATORY LADYBIRDS (COLEOPTERA: COCCINELLIDAE) TO POPULATION DENSITIES OF BEMISIA TABACI (HOMOPTERA: ALEYRODIDAE)

Author(s)

GHAHARI H. | SHOJAI M. | BAYAT ASADI H. | Issue Writer Certificate

Keywords

FUNCTIONAL RESPONSEQ2

LADYBIRDSQ2

BEMISIA TABACIQ3

PREDATIONQ4

Abstract

The FUNCTIONAL RESPONSE of LADYBIRDS, Coccinella septempunctata L., Hippodamia variegata Goeze, and Clitostethus arcuatus Rossi (Coleoptera: Coccinellidae) was evaluated on different densities of BEMISIA TABACI Gennadius in the laboratory, at 25±2 °C, 75 - 90% RH, and 16: 8 (L:D) photoperiod. All data fitted well to the type II model of the Holling disc equation. The predators consumed larger numbers of early than late instars of B. tabaci within the same exposure time. Adult C. arcuatus had a lower instantaneous searching efficiency and handling time and could also consume larger numbers of B. tabaci than could mature larvae. Overall, the PREDATION efficiency of C. septempunctata on B. tabaci was higher than other LADYBIRDS, thus it can control the aleyrodids population effieiciently.

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